Download or read book Modelizaci n cartogr fica para la evaluaci n de procesos de erosi n del suelo written by José Julio Zancajo Jimeno and published by . This book was released on 2003 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metodolog a provisional para la evaluaci n de la degradaci n de los suelos written by and published by . This book was released on 1980 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Importancia de la degradación de los suelos. Principios adoptados en la metodología. Procesos de degradación de los suelos. Unidades de medida y comparabilidad entre los diferentes procesos. Recomendaciones para la continuación de la comprabación de la metodología. Métodos de evaluación principales. Observación de los datos de la teledetección. Modelos matemáticos. Evaluación por métodos paramétricos. Evaluación de cada tipo de degradación de los suelos. Erosión hídrica. Erosión eólica. Salinización y sodicación. Degradación química. Degradación física. Degradación biológica. Factores de degradación y fuentes de datos a diferentes escalas. Simbolos utilizados y problemas cartograficos. Empleo de las observaciones directas y de la teledeteccion. Metodos cartograficos parametricos.

Download or read book Evaluaci n de la erosion h drica en parcelas experimentales en campos agr colas de secano mediterraneo written by and published by . This book was released on 2013 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Esquema metodol gico para la planificaci n de usos del suelo en zonas tropicales h medas written by Neusa María Costa Mafra and published by . This book was released on 1997 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aspectos generales y objetivos; Planificacion de uso del suelo: bases conceptuales y niveles de aplicacion; Aproximaciones metodologicas en el processo de planificacion; Evaluacion del suelo como herramienta basica para la planificacion del uso del suelo; Aspectos de la planificacion versus la cuestion ambiental y las estructuras regionales; Bases metodologicas para el inventario de las caracteristicas de la tierra; Estudios previos; Levantamiento de campo; Analisis de laboratorio; Soporte cartografico; Metodologia para la cartografia de las unidades morfodinamicas; Enfoques metodologicos; Cartografia: metodos; Unidades morfodinamicas: conceptos y definicion de los taxones; Metodologia de valoracion de la erosion actual y potencial; Enfoques metodologicos; Propuesta metodologica para la valoracion de la erosion actual y potencial; Valoracion de la erosion actual; Valoracion de la erosion potencial; Metodologia de evaluacion de la capacidad de uso; Antecedentes y enfoques metodologicos; Propuesta metodologica para la evaluacion de la capacidad de uso; Criterios para la definicion de las clases y subclases de capacidad de uso; Metodologia de orientacion de uso agrario; Propuesta metodologica para la orientacion de uso; Aplicacion de la metodologia; Caracterizacion de la zona de estudio; Introduccion; Aspectos de la geologia y geomorfologia del territorio; Aspectos del clima del territorio; Uso del suelo en el territorio; Suelos; Definicion y descripcion de las unidades taxonomicas; Definicion y descripcion de las unidades cartograficas de suelo; Analisis de suelo; Descripcion y distribucion de los taxones: ambientes, sistemas y unidades morfodinamicas; Los taxones: descripcion y distribucion geografica en el territorio; Mapa de unidades morfodinamicas; Valoracion de la erosion actual y potencial; Consideraciones en cuanto a la erosion actual y potencial en el territorio; Descripcion de los resultados por grados de erosion combinados; Mapa de erosion actual y potencial; Capacidad y orientacion de uso; Clases de capacidad de uso y propuesta de orientacion de uso.

Download or read book Predicting the Particle Size Distribution of Eroded Sediment Using Artificial Neural Networks written by María Paz Lagos Avid and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La erosión hídrica provoca la degradación del suelo y procesos de contaminación difusa. Los contaminantes son principalmente transportados sobre las superficies de partículas finas del suelo y del sedimento. Se han desarrollado varios modelos de pérdida de suelo y ecuaciones empíricas para la estimación de la distribución del tamaño del sedimento que abandona un terreno, incluyendo modelos en base física y ecuaciones empíricas. Por lo general los modelos de base física requieren una gran cantidad de datos, a veces superando la cantidad disponible en el área modelada. Por el contrario, las ecuaciones empíricas no siempre predicen la composición de los sedimentos asociados con eventos individuales y pueden requerir datos que no están disponibles. Por lo tanto, el objetivo de este estudio fue desarrollar un modelo para predecir la distribución del tamaño de partícula (DTP) del suelo erosionado. Se utilizaron 41 eventos de erosión provenientes de 21 suelos. Estos datos fueron compilados a partir de estudios previos. Se utilizó análisis de correlación y regresión múltiple para identificar las principales variables que controlan la DTP del sedimento. Estas variables fueron la distribución del tamaño de partícula en la matriz del suelo, la condición inicial de humedad del suelo, la erodibilidad del suelo y la geometría de la ladera. Con estas variables se calibró una red neural artificial utilizando datos de 29 eventos (r2 = 0,98, 0,97 y 0,86, para arena, limo y arcilla en el sedimento, respectivamente) y luego se validaron y probaron en 12 eventos (r2 = 0,74, 0,85 y 0,75, para arena, limo y arcilla en el sedimento, respectivamente). La red neural artificial se comparó con tres modelos empíricos. La red presentó un mejor desempeño en la predicción de DTP de sedimentos y la diferenciación de eventos de lluvia-escorrentía en el mismo suelo. Además de la calidad de las estimaciones de distribución de partículas, este modelo requiere un pequeño número de variables fácilmente obtenibles, proporcionando una rutina conveniente para predecir la DTP en sedimentos erosionados en otros modelos de transporte de contaminantes.

Download or read book A handbook on flood hazard mapping methodologies written by Andrés Díez Herrero and published by IGME. This book was released on 2009 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Spanish Coastal Systems written by Juan A. Morales and published by Springer. This book was released on 2018-09-03 with total page 809 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents the state of art of the geologic knowledge about the Spanish coast obtained through scientific research in the last 30 years.From a general point of view, coasts are the most quickly changing systems of the Earth. This is critical, since many human resources, such as the main part of economic and social activities, are located in the coastal areas. Especially in the case of Spain these coasts include cities, wide industrial areas (including harbor complexes), important ecologic systems, and our main economic resource: tourism. Understanding the dynamic functioning of each element of this coast is vital for correct future coastal management, so as to solve problems derived from bad plans developed in the last decades of the twentieth century. This is a valuable text for advanced graduate students and coastal researchers, which connects the specific dynamic functioning of the main Spanish coastal environments and their relationships with human activities.

Download or read book Soil Water Repellency written by C.J. Ritsema and published by Elsevier. This book was released on 2012-12-02 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has become clear that soil water repellency is much more wide-spread than formerly thought. Water repellency has been reported in most continents of the world for varying land uses and climatic conditions. Soil water repellency often leads to severe runoff and erosion, rapid leaching of surface-applied agrichemicals, and losses of water and nutrient availability for crops. At present, no optimum management strategies exist for water repellent soils, focusing on minimizing environmental risks while maintaining crop production. The book starts with a historical overview of water repellency research, followed by seven thematic sections covering 26 research chapters. The first section discusses the origin, the second the assessment, and the third the occurrence and hydrological implications of soil water repellency. The fourth section is devoted to the effect of fire on water repellency, section five deals with the physics and modeling of flow and transport in water repellent soils, section six presents amelioration techniques and farming strategies to combat soil water repellency, and section seven concludes the book with an extensive bibliography on soil water repellency.

Download or read book Modelling Environmental Dynamics written by Martin Paegelow and published by Springer Science & Business Media. This book was released on 2008-07-16 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modelling environmental dynamics is critical to understanding and predicting the evolution of the environment in response to the large number of influences including urbanisation, climate change and deforestation. Simulation and modelling provide support for decision making in environmental management. The first chapter introduces terminology and provides an overview of methodological modelling approaches which may be applied to environmental and complex dynamics. Based on this introduction this book illustrates various models applied to a large variety of themes: deforestation in tropical regions, fire risk, natural reforestation in European mountains, agriculture, biodiversity, urbanism, climate change and land management for decision support, etc. These case studies, provided by a large international spectrum of researchers and presented in a uniform structure, focus particularly on methods and model validation so that this book is not only aimed at researchers and graduates but also at professionals.

Download or read book Isotope Techniques in Hydrology written by International Atomic Energy Agency and published by . This book was released on 1968 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Memoirs of a Peasant Boy written by Xosé Neira Vilas and published by Trafford. This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Balbino,"a boy from a village", a "nobody" who writes a notebook about everything that happens to him within the repressed and stifling society of Galicia in the thirties and forties. He tells of the moral and social atmosphere that prevails asking and answering questions and details the most elemental social struggle. There is also however the story of a true but impossible love. This book was first printed in Argentina in 1961 and became one of the most successful Galician books published. It has a lyrical style that immediately evokes sights and sounds of this part of Spain. The author Xosé Neira Vilas writes from his experiences of the era and the lifestyle of boys growing up in that society and provides a rich insight to life of the peasant boy "Balbino".

Download or read book Human Impact on Erosion and Sedimentation written by International Association of Hydrological Sciences. Scientific Assembly and published by IAHS Press. This book was released on 1997 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Erosion and Sediment Yield written by Richard Frederick Hadley and published by . This book was released on 1984 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flood Risk Assessments written by Andrés Díez-Herrero and published by . This book was released on 2020-09-09 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, a considerable volume of technical literature has been published on flood hazard analysis, and more recently, on flood vulnerability and resilience. Nevertheless, there is still a shortage of scientific studies and practical experience of real flood risk assessment (both social and economic), including hazard, exposure and vulnerability analyses and their integration. As there are so few references available, applications of flood risk assessment to the design of preventive measures and early warning systems, landscape and urban planning, civil protection, insurance systems, and risk-based information and education, cannot reach their full potential development. This is because the research products available, such as hazard data and maps, do not serve to ensure the efficient prioritization of mitigation measures or communities at risk. Meanwhile, flooding is the natural disaster that causes the greatest loss on a global scale, and due to climate change, this situation is expected to continue. The research manuscripts involved in this book try to offer flood risk managers new tools, data and maps to improve risk mitigation, both preventive and corrective. A wide variety of topics have been covered, including: flood risk data sources; techniques and methodologies for flood risk analysis; flood risk mapping; or flood risk analysis calibrations.

Download or read book Boundaries written by Christine E. Gudorf and published by Georgetown University Press. This book was released on 2010-04-15 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this expanded and revised edition of a fresh and original case-study textbook on environmental ethics, Christine Gudorf and James Huchingson continue to explore the line that separates the current state of the environment from what it should be in the future. Boundaries begins with a lucid overview of the field, highlighting the key developments and theories in the environmental movement. Specific cases offer a rich and diverse range of situations from around the globe, from saving the forests of Java and the use of pesticides in developing countries to restoring degraded ecosystems in Nebraska. With an emphasis on the concrete circumstances of particular localities, the studies continue to focus on the dilemmas and struggles of individuals and communities who face daunting decisions with serious consequences. This second edition features extensive updates and revisions, along with four new cases: one on water privatization, one on governmental efforts to mitigate global climate change, and two on the obstacles that teachers of environmental ethics encounter in the classroom. Boundaries also includes an appendix for teachers that describes how to use the cases in the classroom.

Download or read book The Andes written by Onno Oncken and published by Springer Science & Business Media. This book was released on 2006-11-22 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the first comprehensive overview of a complete subduction orogen, the Andes. To date the results provide the densest and most highly resolved geophysical image of an active subduction orogen.

Download or read book Landslide Science and Practice written by Claudio Margottini and published by Springer Science & Business Media. This book was released on 2013-08-15 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains peer-reviewed papers from the Second World Landslide Forum, organised by the International Consortium on Landslides (ICL), that took place in September 2011. The entire material from the conference has been split into seven volumes, this one is the first: 1. Landslide Inventory and Susceptibility and Hazard Zoning, 2. Early Warning, Instrumentation and Monitoring, 3. Spatial Analysis and Modelling, 4. Global Environmental Change, 5. Complex Environment, 6. Risk Assessment, Management and Mitigation, 7. Social and Economic Impact and Policies.